(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Apple Manual: PowerBook G4 15 FW800"

Service Source 




PowerBook G4 (15-inch FW800) 

16 September 2003 



© 2003 Apple Computer, Inc. All rights reserved. 



Service Source 




Take Apart 



PowerBook G4 (15-inch FW800) 



© 2003 Apple Computer, Inc. All rights reserved. 




General Information 




Overview 



Some key features that distinguish this computer from earlier PowerBook models include: 
New aluminum alloy enclosure 
Built-in Bluetooth 
Built-in FireWire 800 port 
Supports USB 2.0 

Uses double-data rate (DDR) memory 
Optional AirPort Extreme card 

Optional fiber optic backlit keyboard with ambient light sensors 
New battery pack 



General Information 



PowerBook G4 (15-inch FW800) Take Apart - 1 



New Procedures 

If you are familiar with taking apart notebook computers, there are a few critical 
differences: 

• Important: The top case removal has two critical removal steps: 

- A hidden latch behind the optical drive felt must be disengaged with a tool before 
lifting off the top case. 

- There are two flex cables (keyboard and multifunction trackpad) from the top case 
to the logic board. Carefully lift the top case to avoid pulling these connectors off 
the main logic board. 

• The keyboard is secured with screws accessible from under the top case. 

• Memory cards are easily accessible from the bottom of the computer. Important: To 
avoid applying too much pressure onto the memory slot locking tabs, spread the tabs 
apart when installing memory cards. 

• The AirPort Extreme card is easily installed or replaced through a door in the main 
battery compartment. 

• The quantity and types of screws differ from earlier models. 

Important Note 

• Memory from the previous 15-inch PowerBook is not compatible with this computer. 



Tools 



The following tools are recommended for the take apart procedures. 
ESD wrist strap and mat 
Soft cloth 

#0 Phillips screwdriver (magnetized) 
#1 Phillips screwdriver (magnetized) 

4 mm socket wrench 

5 mm socket wrench 
1 .5 mm Hex key (or Torx T6) 
Needlenose pliers 
Torx T8 screwdriver 
Thermal pad kit (076-1055) 
EMI gaskets kit (076-1057) 
Alcohol pads 

Dental pick (with up to ninety-degree bend) 

Black stick (nylon probe tool 922-5065) (or other nonconductive nylon or plastic flat- 
blade tool) 

Multi-compartment screw tray (such as a plastic ice cube tray) 
Double-stick tape 
Kapton® tape (922-1731) 
Voltmeter (for troubleshooting) 
Small low-power magnet (for troubleshooting) 
Apple Pro keyboard and mouse (for troubleshooting) 



2 - PowerBook G4 (15-inch FW800) Take Apart 



General Information 



Serial Number Location 

The serial number is located in the battery bay. 




■^■'"lli; ll i ■ *■■ -iiniiiiUMill 




General Information 



PowerBook G4 (15-inch FW800) Take Apart - 3 




Foot 



Tools 

This procedure requires the following tools: 

• Foot kit 

• Tweezers or needlenose pliers 

• Soft cloth 



Preliminary Step 

Before you begin, identify the foot that needs replacement. Check the bottom case of the 
computer and compare it with the images in this table: 



Plug Area on Bottom Case 



Matching Foot 



Action 



Missing plug 




Case plug 



Not available for 
replacement 



Case foot 





Replace the bottom 
case, or send to Apple 
Repair Center. 



Continue with the 
procedure, matching 
the foot to the plug on 
the bottom case. 



4 - PowerBook G4 (15-inch FW800) Take Apart 



Foot 



Procedure 

Warning: The glue used in this procedure can bond instantly to skin. Do not touch the 
glue. In the event of contact, review the safety instructions at the end of this document. For 
additional information, refer to the glue manufacturer: 

Elmer's Products, Inc. 
Columbus, OH. 43215-3799 
www.krazyglue.com 

1 . Place the computer upside down on a clean, lint-free cloth or other nonabrasive 
surface. 

2. Select a foot from the kit. (Refer to the images shown in the table.) Do not use a foot 
that does not match. 

3. Make sure the plug area on the bottom case is clean. If any portion of the soft rubber 
foot remains, remove it so that only the hard plastic plug is visible (as shown below). 

Important: Notice the inner ring of the plug. When positioning the foot, make sure 
the textured plane of the rubber foot fits into the compatible ring in the plug. This 
ensures a balanced and level fitting. 




Foot 



PowerBook G4 (15-inch FW800) Take Apart - 5 



Warning: GLUE IS AN EYE AND SKIN IRRITANT. BONDS SKIN INSTANTLY. Do not 
touch the glue at any time. Before opening the glue, review the safety instructions at 
the end of this document. 

Important: The glue tube included in the kit is sealed until first use. Do not break the 
seal until you are ready to use the glue. To break the seal, hold the tube upright and 
away from you. Place the hollow nozzle cap on the tube and tighten it all the way 
down. The tube is then ready to dispense the glue through the nozzle cap. 




5. Apply one drop of glue to the plug on the bottom case. Do not spread the glue. 

6. Using tweezers or needlenose pliers, carefully position the new foot so its textured 
surface fits into the inner ring of the plug. 

7. Using the end of the tweezers or pliers — not your finger — lightly press and hold the 
foot in place for 30 seconds. 




8. Before turning over the computer, allow the glue to set for at least 15 minutes. 

9. Discard the tube of glue. 

SAFETY INSTRUCTIONS: GLUE IS AN EYE AND SKIN IRRITANT. BONDS SKIN 
INSTANTLY. Contains ethyl cyanoacrylate. Avoid contact with skin and eyes. If eye or 
mouth contact occurs, hold eyelid or mouth open and rinse thoroughly but gently with 
water only for 15 minutes and GET MEDICAL ATTENTION. Liquid glue will sting eye 
temporarily. Solidified glue may irritate eye like a grain of sand and should be treated by an 
eye doctor. If skin bonding occurs, soak in acetone-based nail polish remover or warm 
soapy water and carefully peel or roll skin apart (do not pull). Contact through clothing may 
cause skin burn. If spilled on clothing, flush with cold water. Avoid prolonged breathing of 
vapors. Use with adequate ventilation. KEEP OUT OF REACH OF CHILDREN. 



6 - PowerBook G4 (15-inch FW800) Take Apart 



Foot 




Battery 



Tools 

This procedure requires the following tools: 

• Soft cloth 

• Coin 

Part Location 



c 




Preliminary Steps 

Warning: Always shut down the computer before opening it to avoid damaging its 
internal components or causing injury. After you shut down the computer, the 
internal components can be very hot. Let the computer cool down before 
continuing. 



Battery 



PowerBook G4 (15-inch FW800) Take Apart - 7 



Procedure 

Warning: If the computer has been recently operating, allow it to cool down before 
performing this procedure. 

1 . Shut down the computer. 

2. Disconnect the power cord and any other cables connected to the computer. 

3. Place the computer face down on a soft cloth. 

4. Insert a coin in the battery lock slot and turn it one quarter turn clockwise. The battery 
should raise up slightly. Lift the battery out of the battery bay. 




8 - PowerBook G4 (15-inch FW800) Take Apart 



Battery 




Memory Door and 
Memory Cards 



Tools 

This procedure requires the following tools: 

• Soft cloth 

• #0 Phillips screwdriver 

Part Location 




Preliminary Steps 

Before you begin, remove the battery. 



Memory Door and Memory Cards 



PowerBook G4 (15-inch FW800) Take Apart - 9 



Procedure 

Warning: If the computer has been recently operating, allow it to cool down before 
performing this procedure. 

1 . Place the computer face down on a soft cloth. 

2. Remove the four screws from the memory door then remove the door. 



©- 





■ 



_0 




Note: If only one memory card is installed, the factory installs it in the bottom memory slot. 
Note: Memory must be removed from the top slot before removing from the bottom slot. 



10 - PowerBook G4 (15-inch FW800) Take Apart 



Memory Door and Memory Cards 



3. To remove memory cards, carefully spread the two locking tabs for the slot (top or 
bottom) away from the card on both sides and allow the card to pop up slightly. 













£ 


*j£J^ 


~^~^r-^ 




h 




F «.^H0Lk 


WJ ' 


■ 


•^ _~t^Ci^j^^p^^ . 


■ - 




§ 


% '*■ 


J 


■ ,/, '■ ■ 


■■ JS 


Sfmmf. 


ku 


c^ 


■ i-- a/Mmr 


&J 


lm 


. "JF F 


■:■■ ,'■;■■■■ ■ 


^ 

-? 


mff 

Mr ■ . ■ 


n --,:. :.■■■■..-. 


^§s 


PSr^ 




^< 


■^*f^7 


.V 




^■ir"*^ 


WSm 


^■"7' + 


y ■£= / 



4. Pull the card straight back and out of the memory slot. 




Memory Door and Memory Cards 



PowerBook G4 (15-inch FW800) Take Apart - 11 



Replacement Procedure 

Notes: 

• The top and bottom memory cards are inserted at different angles. 

• If installing two cards, install into the bottom slot first. 

• Align the notch in the memory card with the tooth in the slot before inserting. 

1 . To install a memory card into the bottom slot, insert the card at a low angle behind the 
locking tabs of the top slot. 




12 - PowerBook G4 (15-inch FW800) Take Apart 



Memory Door and Memory Cards 



2. Slide the card forward to the lower slot. Firmly push the card straight into the slot until 
it is fully and securely seated along its length. 

Note: If the back of the card drops down before it is fully seated, raise it up enough to 
push it fully into the slot. 




3. Carefully spread the two locking tabs for the bottom slot away from the card on both 
sides while pushing the card straight down until the tabs click onto both sides of the 
card, locking it into place. 




Memory Door and Memory Cards 



PowerBook G4 (15-inch FW800) Take Apart - 13 



If installing a memory card in the top slot, follow the same procedures as the bottom 
slot except insert the card at a 30-degree angle, above the locking tabs. 




5. Push the card in until it is firmly seated. 

6. As with the bottom slot, spread the locking tabs for the top slot while pushing the card 
straight down until it locks into place. 




14 - PowerBook G4 (15-inch FW800) Take Apart 



Memory Door and Memory Cards 



7. Cards should be flat and secure on both sides. 




8. Install the memory door. 

9. Replace the battery. 

10. Use Apple System Profiler to verify that the memory is recognized. (Choose the menu 
bar Apple logo ( ) > About This Mac, click More Info..., select the System Profile tab, 
open the Memory Overview.) 



Memory Door and Memory Cards 



PowerBook G4 (15-inch FW800) Take Apart - 15 




AirPort Extreme Card 



Tools 

This procedure requires the following tools: 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the battery. 



16 - PowerBook G4 (15-inch FW800) Take Apart 



AirPort Extreme Card 



Procedure 

1 . Pull outward on the slot to open the AirPort Extreme Card door. 




2. Use a black stick to pull out the card's clear plastic pull tab, tucked underneath. 




AirPort Extreme Card 



PowerBook G4 (15-inch FW800) Take Apart - 17 



3. Gently disconnect the AirPort Extreme antenna cable. 




4. Use the pull tab to pull out the card. 




18 - PowerBook G4 (15-inch FW800) Take Apart 



AirPort Extreme Card 



5. Slide the replacement AirPort Extreme Card into the slot, as shown. 




6. Push the card into the slot until fully seated. 




AirPort Extreme Card 



PowerBook G4 (15-inch FW800) Take Apart - 19 



7. Connect the end of the antenna cable to the card. 




8. Loop the clear plastic tab down around the antenna cable and tuck it into the slot 
under the card so that it secures the cable. 




20 - PowerBook G4 (15-inch FW800) Take Apart 



AirPort Extreme Card 



9. Close the AirPort door, reassemble and test the computer. 




AirPort Extreme Card 



PowerBook G4 (15-inch FW800) Take Apart - 21 




Top Case 



Tools 



This procedure requires the following tools: 
#0 Phillips screwdriver (magnetized) 
1 .5 mm Hex key (or Torx T6) 
Dental pick (with up to a ninety-degree bend) 
Black stick (or other nonconductive nylon or plastic flat-blade tool) 
Soft cloth 
Multi-compartment screw tray 



Part Location 





Mass 5-555" 



rSTl_!±ySi„u 




22 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Memory door 



Procedure 

Note: This procedure removes the top case and keyboard assembly. The keyboard is 
removable only after removing the top case. 

1 . Place the computer face down on a soft cloth. 

2. Remove the two screws inside the battery bay. 

3. Remove the two screws from the memory bay. 

4. Remove the four screws along the back edge. 



o 



o 



o 




Si 



& 



o 



o 



11 



tr g 




Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 23 



5. With the display open, rest the computer on one side. Remove the three screws. 




6. Turn over the computer and remove the three screws on the other side. 




24 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



7. Open the computer slightly and rest it with the back facing up. Remove the two top 
screws along the back. 

Note: Do not remove the bottom screws. 




8. Lay the computer right side up and open the display slightly past 90-degrees. 

9. Remove the two hex screws at the back corners of the top case (a Torx T6 can also 
be used). 




Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 25 



10. Use a black stick along the seam of the top and bottom case to help release the top 
case at the back sides (gently twisting the black stick may help). 




26 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



1 1 . Important: There is an hidden clip that secures the front of the top case. This clip 
must be released before the top case can be removed. The clip can be seen behind 
the optical drive felt, on the left side. Also, there are small slits in the top felt. The clip is 
behind the first slit from the left. 

Use a black stick along the seam of the top and bottom case to add slight upward 
pressure so that the top case will pop up when the clip is released. Then insert a 
dental pick behind the clip and pull out slightly to release the clip and the top case. 





Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 27 



12. With the top case released from the bottom case and lifted slightly so that it does not 
touch the bottom case, lift the front of the top case, pivoting along the back, to rest the 
top case against the display. Do not strain the cables connected to the logic board. 

Important: Adjust the display so that there is no strain on the top case cables and so 
the top case will not fall forward. 





28 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



13. Disconnect the trackpad flex cable. 

14. Carefully disconnect the keyboard flex cable. Use a non-marring flat-blade tool to slide 
the locking bar back slightly on both sides. 

Important: The keyboard flex cable is a Zero insertion force (ZIF) connector. The 
locking bar on the connector is extremely fragile and is not intended to separate from 
the connector. When releasing the bar, use extreme care and a restrained light 
pressure to move the bar only slightly. 

Warning: If the locking bar breaks, you will need to replace the logic board. 




Replacement Notes: 

Make sure the locking bar is released, then slide the end of the flex cable all the way 
into the connector, above the locking bar. Hold the cable in place, then slide the 
locking bar into the connector on both sides to secure. 

Important: Verify that the cable is straight. Use the markings on the cable as guides. 

Warning: If the flex cable is inserted crooked, some signals may not be 
connected or signals may short together. 

Note: If a cable is not securing properly, verify that it is inserted on the correct side of 
the locking bar. 

15. Lift off the top case. 



Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 29 



Replacement Procedure 



Note: If replacing the top case, remove the keyboard and transfer it to the replacement top 
case. 

1 . Visually check to verify that all cables are connected and routed correctly with nothing 
raised up or incorrectly over a component. 

2. Check perimeter wiring, where shown, to verify that it will not be caught or pinched by 
the top case during replacement. 







3. Verify that the LVDS cable is secured with Kapton tape and lays flat. 




30 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



4. On the top case, check cable connections and routing. 

Note: The top case below has the wires and connector for the fiber optics for the 
optional backlit keyboard (right side). This will not be present on some configurations. 



**S 



-.-.■a. 



-C ! T- 




i nil i irt 1 1 iii i ■ iii^'in i 't'v ' ■" 
: i ■ + . v ■, 



^a scp^ 



^^ 




«i r»Mi 



5. Check that the perimeter metal tabs are not bent. 

Note: The metal quickly fatigues and can break off easily. Be extremely careful to 
gently straighten tabs, if needed. 




Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 31 



6. Lay the top case against the open display, as shown. 









7. Connect the flex cables from the top case to the logic board. 

8. Lift the top case slightly and rotate it down over the bottom case (verify that the cables 
are folding properly) and align the corners. 

9. Start at the right corner and guide the top case onto the bottom case. Use a black 
stick to carefully pull or push tabs slightly, if needed. 

Note: Some side screws have a flexible screw boss. If they block a tab on the top 
case from seating, use the pointed end of a black stick through the screw hole to 
push on the boss slightly. 

Important: The tabs are fragile. Do not apply too much pressure or bend them. 

Important: The top case should lay flat along the sides and top, if not, make sure 
that cables and components are not interfering. 



32 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 



Important: Screw order is vital for the proper attachment of the top case. 
10. Reinstall the side screws in the order shown, below. 

Replacement Note: Do NOT insert side screws into the DVI port screw holes. The 
screws can jam in the holes, requiring removing the logic board to remove. 





Top Case 



PowerBook G4 (15-inch FW800) Take Apart - 33 



1 1 . Close the computer, flip it over, and install the four back screws. 

12. Install the two screws in the memory bay. 

13. Install the memory door and four screws. 

14. Install the two screw in the battery bay. 




15. Replace the battery. 

16. Testing the computer should include powering on, checking the keyboard and 
trackpad function. 

If the computer has the optional keyboard backlight feature, operate the computer in 
a darkened room to check for keyboard backlight function. 



34 - PowerBook G4 (15-inch FW800) Take Apart 



Top Case 




Keyboard 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




GEI 



ng^o 



r 1 1 ' \ ' ' ". " 
T.AJJ J V 






Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 



Keyboard 



PowerBook G4 (15-inch FW800) Take Apart - 35 



Procedure 

Note: There are two different keyboards and top cases used with this computer, 
depending upon the configuration, either backlit or non-backlit. 

Important: Verify that the correct replacement keyboard is ordered, and/or top case if 
replacing. The keyboards are not interchangeable, and damage could result. 

The top case for the backlit keyboard has the fiber optics and connector (right side). The 
keyboard for the backlit top case has icons on the F8 to F10 keys for the backlighting 
feature. 




The top case for the non-backlit keyboard does not have the fiber optics and connector. 
The keyboard for the non-backlit top case does not have icons on the F8 to F10 keys. 




36 - PowerBook G4 (15-inch FW800) Take Apart 



Keyboard 



1 . Turn the top case over and carefully remove the black insulator film. If new film was 
not provided with the replacement part, reserve the film for reinstallation. 

Important: If the computer has the fiber optics for the optional backlit keyboard, do 
not remove the black insulator around the optics and cables. 




Important: If the computer has the fiber optics for the optional backlit keyboard, do 
not remove the black insulator around the optics and cables. 




- 




J.AJlAA.% l^n^MH. 



JJJJ_1±1JJU1 I ■ Jptii 






Keyboard 



PowerBook G4 (15-inch FW800) Take Apart - 37 



2. Gently pull up on the keyboard flex cable to release the adhesive at its base. 




3. Remove the thirteen screws. 

Note: The non-backlit top case shown. 







O © 




38 - PowerBook G4 (15-inch FW800) Take Apart 



Keyboard 



4. Use the pointed end of a black stick and push through the screw hole at the top left 
side until the keyboard begins to separate from the top case. Work your way along 
through successive screw holes until a black stick can be inserted under the keyboard 
from the top. 

Important: To avoid damaging the screw boss threads, do not use a metal tool. 




Keyboard 



PowerBook G4 (15-inch FW800) Take Apart - 39 



5. Carefully lift up the keyboard and guide out its flex cable (shown below). 
Important: Be careful not to strain or tear the keyboard flex cable. 





6. If adhesive residue is left by the keyboard in the keyboard bay, and on the fiber optics 
(if present), carefully rub it off. 



40 - PowerBook G4 (15-inch FW800) Take Apart 



Keyboard 



Replacement Procedure 

1 . To install the keyboard or replacement keyboard, insert its flex cable through the slot in 
the top case and rest the bottom of the keyboard evenly along the bottom edge of the 
keyboard bay. 

2. Remove any protective cover from adhesive strips on the keyboard. While keeping the 
bottom of the keyboard flush against the bottom of the keyboard bay, rotate the 
keyboard into place so that the screw bosses fit into the boss holes. 




3. Use a black stick to guide the sides of the keyboard into the keyboard well. 




Keyboard 



PowerBook G4 (15-inch FW800) Take Apart - 41 



4. Install the keyboard screws in the order shown. 




5. Install new or reinstall the insulator film. Remove any protective cover from the 
adhesive and fit the small round hole in the film over the raised screw boss (one on 
each side) to start the alignment. Avoid wrinkles or bulges. 

On the power button side, run your finger along the film where it folds over the edge 
of the keyboard bay, to help secure the adhesive and prevent light leakage. 

Important: The film must be installed and in the same location to protect against 
contact and electrical shorting in certain areas and to allow contact with the EMI 
spring on the logic board. 




42 - PowerBook G4 (15-inch FW800) Take Apart 



Keyboard 



6. To secure the keyboard flex cable, remove any protective cover on the adhesive at the 
base of the cable. Pull the cable up straight and then forward to lay it flat across the 
the keyboard bay. Run your finger along the base of the flex cable to secure the 
adhesive. 







7. Reassemble the computer. 

8. Testing the computer should include powering on, checking the keyboard and 
trackpad function. 

If the computer has the optional keyboard backlight feature, operate the computer in 
a darkened room to check for keyboard backlight function, and light leakage around 
the perimeter of the keyboard, speaker grill openings and side ports. 



Keyboard 



PowerBook G4 (15-inch FW800) Take Apart - 43 




Backup Battery 



Tools 

This procedure requires the following tools: 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 



44 - PowerBook G4 (15-inch FW800) Take Apart 



Backup Battery 



Procedure 

1 . Use a black stick to release the adhesive holding the backup battery to the optical 
drive then disconnect the backup battery cable. 

Note: The backup battery is held down by double-backed tape adhesive on its cover. 




Backup Battery 



PowerBook G4 (15-inch FW800) Take Apart - 45 



Replacement Procedure 

1 . Connect the backup battery cable to the backup battery and to the logic board. 

2. Remove any protective adhesive cover on the replacement backup battery. 

3. Notice the curve of the metal bracket along the right edge of the optical drive. Position 
the backup battery precisely as shown. 

Important: If the backup battery is not positioned correctly, sharp edges on the top 
case over the backup battery may cause damage. 



nlM III || 



"j.Ti-V-.l-i 



■,'.:.j?il i uvv-iui^ 

mwmsn 



FAHroacMP*™* 



in :;■■/' 



[MIM 



IfrPhlfrilLf AT ™ E Oft : E Qf M* 'ikJF *C ! IHI ftMK 



MWJKttl LAK.RiT.PAL'? • 

LAtWraV "■■ ■ '^ Lfh 

•^.i-.i .■.■■•■■■!■,■,■... ■:>^.lrrai<UL' 




. r ji^M..i i;i. /'.■-•/ PEN AV I • i, ;■ '■' 

■ 

MVMHL ^yiVLOLAHHSraiLWlVtil^llOl 

i •-. ..'I •.- " I : 
UHHAKL 

JiAjUTJO E*rEESEE^ , „ r _ w 



46 - PowerBook G4 (15-inch FW800) Take Apart 



Backup Battery 



4. Press where shown to secure the backup battery to the optical drive. 




5. Reassemble the computer. 

6. Testing the computer should include plugging in the power adapter and letting the 
backup battery charge for half an hour. Then power on the computer and disconnect 
the power adapter, set the system clock, put the computer to sleep, remove the main 
battery for five seconds and reinstall. The date and time should not reset. 

Also, insert an optical disc to verify that the optical drive functions properly. 



Backup Battery 



PowerBook G4 (15-inch FW800) Take Apart - 47 




Optical Drive 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• Thin double-back tape (if the backup battery will not re-stick securely) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




*-'■■■ ' . 


9 


• 


r 


^SSwsilfa;^ 






Lb 


U 1 m/.-^yL , 4vr.kh 





Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

• Backup battery 



48 - PowerBook G4 (15-inch FW800) Take Apart 



Optical Drive 



Procedure 

1 . Remove the two screws from the drive hold-down bracket. 




2. Lift out the bracket. 




Optical Drive 



PowerBook G4 (15-inch FW800) Take Apart - 49 



3. Use a black stick, or the connector pull tab if present, to carefully loosen and 
disconnect the optical drive flex cable connector. 




4. Lift up on the optical drive at its rear and remove. 




50 - PowerBook G4 (15-inch FW800) Take Apart 



Optical Drive 



5. Transfer the flex cable, side brackets and screws to the replacement optical drive. 





rift 


4 




flp**Maibr<fc r" 


- 






»a * 



•••• 



6. To install the replacement optical drive, insert the front of the drive under any 

overhang at the front of the computer above the optical drive slot, then lower the back 
of the drive into place. 

Important: Verify that the front of the drive does not catch above any bracket or 
overhang at the front of the optical drive bay. 




Optical Drive 



PowerBook G4 (15-inch FW800) Take Apart - 51 



7. Verify that both sides of the drive are fully seated. 

8. Connect the optical drive flex cable connector to the logic board. 

9. Reassemble the computer. 

10. Testing the computer should include powering on, inserting an optical disc and 
ejecting it to make sure the drive is aligned with the opening and functioning properly. 

Test the backup battery by plugging in the power adapter and letting the backup 
battery charge for half an hour. Then power on the computer and disconnect the 
power adapter, set the system clock, put the computer to sleep, remove the main 
battery for five seconds and reinstall. The date and time should not reset. 



52 - PowerBook G4 (15-inch FW800) Take Apart Optical Drive 




Hard Drive 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 



Hard Drive 



PowerBook G4 (15-inch FW800) Take Apart - 53 



Procedure 

1 . Remove the two screws from the drive hold-down bracket. 




2. Lift out the bracket. 




54 - PowerBook G4 (15-inch FW800) Take Apart 



Hard Drive 



3. Use a black stick, or the connector pull tab if present, to carefully loosen and 
disconnect the hard drive flex cable connector. 

4. Lift up on the right side of the hard drive to remove. 




Hard Drive 



PowerBook G4 (15-inch FW800) Take Apart - 55 



5. Transfer the shield, side screws, rubber shockpads and the flex cable to the 
replacement hard drive. 




% 



© 



Note: If replacing the hard drive flex cable, verify that the EMI pad is installed on the 
cable, or install it if supplied, or transfer from the replaced cable. 

6. Install the replacement hard drive and reassemble the computer. 

7. Testing the computer should include powering on, checking that the hard drive is 
recognized, checking for sound from the speakers and that the modem works. 



56 - PowerBook G4 (15-inch FW800) Take Apart Hard Drive 




Modem 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

• Hard drive 



Modem 



PowerBook G4 (15-inch FW800) Take Apart - 57 



Procedure 

1 . Remove the two screws. 




2. Carefully lift the modem to disconnect the flex cable connected underneath. 




58 - PowerBook G4 (15-inch FW800) Take Apart 



Modem 



3. Lift the modem up slightly and disconnect the RJ-1 1 cable connector. 




Replacement Procedure 

1 . Connect the RJ-1 1 cable to the modem. 

2. Verify that the modem RJ-1 1 cable is routed as shown. 




Modem 



PowerBook G4 (15-inch FW800) Take Apart - 59 



3. Position the modem over the pin and align the screw holes, then press down over the 
flex connector location to connect the cable. 

Note: If the modem will not seat on the flex connector, remove the optical drive to 
gain access to the cable. 

4. Check that the modem cable is still secured to the modem. 




5. Reassemble and test the modem. Check the battery latch to make sure nothing is 
interfering with its rotation. 



60 - PowerBook G4 (15-inch FW800) Take Apart 



Modem 




Bluetooth 



Tools 

This procedure requires the following tools: 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




■<&> 



Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

Note: Replacing the Bluetooth cable requires removing the Sound/DC-in board. 



Bluetooth 



PowerBook G4 (15-inch FW800) Take Apart - 61 



Procedure 

1 . Guide the Bluetooth 4-pin connector and antenna cables from under the bottom case 
hardware. 

2. Lift up the Bluetooth board. 




3. Disconnect the Bluetooth antenna cable. 

4. Use a black stick to disconnect the 4-pin connector. 




62 - PowerBook G4 (15-inch FW800) Take Apart 



Bluetooth 



5. If replacing the Bluetooth cable, remove the cable through the space at the PC card 
cage button guide. 




6. Install the replacement Bluetooth board. 

Note: Use Kapton tape if needed to secure the shield around the board. 



Bluetooth 



PowerBook G4 (15-inch FW800) Take Apart - 63 



7. Route cables under the case hardware in the channel as shown, and verify that the 
antenna cable is seated in the cable clips on the speaker assembly. 

Note: The Bluetooth antenna cable secures with the modem cable in the channels 
along the left speaker. If re-securing, insert the Bluetooth antenna wire into the 
channel first, then the modem wire. 




Important: Check that cables are not routed between screw bosses or over case 
edge hardware. 




8. Reassemble and test the computer. Testing should include using Bluetooth to connect 
to another computer. 



64 - PowerBook G4 (15-inch FW800) Take Apart 



Bluetooth 




Left Blower 



Tools 

This procedure requires the following tools: 

• #1 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

Note: Replacing the right blower requires removing the logic board. 



Left Blower 



PowerBook G4 (15-inch FW800) Take Apart - 65 



Procedure 

1 . Disconnect the cables shown below. 




2. Remove four screws. 




66 - PowerBook G4 (15-inch FW800) Take Apart 



Left Blower 



3. Lift out the blower. 

4. Install replacement blower. Reassemble and test computer. 

Replacement Note: Make sure to reseal the tape strip along the edge of the blower. 




Left Blower 



PowerBook G4 (15-inch FW800) Take Apart - 67 




Ambient Light Sensor Boards 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver 

• Torx T8 screwdriver 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 

Computers with the backlit keyboard configuration, only, have a left and a right ambient 
light sensor installed. 







Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 



68 - PowerBook G4 (15-inch FW800) Take Apart 



Ambient Light Sensor Boards 



Procedure 

1 . To remove the left ambient light sensor board, remove the two screws, and disconnect 
the connector from the logic board. 




Ambient Light Sensor Boards 



PowerBook G4 (15-inch FW800) Take Apart - 69 



2. To remove the right ambient light sensor, remove the two screws, then lift up on the 
ambient light sensor board to disconnect it from the logic board (the connector is on 
the bottom of the board). 

Note: The sensor assembly consists of two pieces: the sensor board and a lens 
cover. 




Replacement Note: Assemble the replacement sensor board and lens cover before 
installation. 




70 - PowerBook G4 (15-inch FW800) Take Apart 



Ambient Light Sensor Boards 



3. Press, where shown here, to secure the right ambient light sensor board connector to 
the logic board. 




4. Reassemble and test the computer. 



Ambient Light Sensor Boards 



PowerBook G4 (15-inch FW800) Take Apart - 71 




Logic Board 



Tools 

This procedure requires the following tools: 

• #1 Phillips screwdriver (magnetized) 

• Thermal Pad Kit (076-1055), if not ordering a replacement logic board or heatsink 

• EMI Gasket Kit (076-1057) 

• Alcohol pads 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Note: To organize the screws you remove from the computer, use a tray with divided 
compartments (such as a plastic ice cube tray). 

Part Location 




72 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 



Preliminary Steps 

Before you begin, run the computer until warm (if possible) to help soften the thermal 
material on the logic board, then shut it down and remove the following: 

• Battery 

• Top case 

• Right ambient light sensor board and lens cover, if present 

Note: It may be helpful to remove the optical drive and hard drive to reduce the number of 
cables to control when replacing the logic board, if desired. 

Procedure 

Warning: Flexing of the logic board can break solder joints to parts. To prevent 
damage to the board, guard against flexing. 

1 . Disconnect the cables shown. 




Logic Board 



PowerBook G4 (15-inch FW800) Take Apart - 73 



2. Remove the two screws and move the right speaker and wire down away from the 
logic board. 




3. Remove the screws shown. 

Note: If a right ambient light sensor board was removed, that procedure already 
removed the upper right logic board screw. 




74 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 



4. Important: Thermal material on the bottom side of the board, between the board and 
heatsink, may make it difficult for the board to release. 

Verify that all screws have been removed, then use a black stick to apply light, slow, 
upward pressure under the left side of the logic board until the it releases from the 
heatsink. Do not pry. Do not flex the board. 




5. After the board releases, lift the left side slightly and remove the two connectors. 




Logic Board 



PowerBook G4 (15-inch FW800) Take Apart - 75 



6. Carefully lift the left side of the board and pivot along the ports side. Support the board 
along its sides as it lifts to avoid flexing. 

Warning: Do NOT flex the board. Give special attention at the narrow neck of 
the blower cutout. 

7. Carefully pull the port end of the board out of the port openings. 

Note: If the DVI port catches underneath, maneuver the board until it releases. 




76 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 



Warning: To avoid flexing the logic board, hold the board vertically along the wide 
sides. Do not hold the board by the ends or by the narrow neck at the blower cutout, 
or horizontally, as the board's weight can cause excessive flex. 




Logic Board 



PowerBook G4 (15-inch FW800) Take Apart - 77 



Replacement Procedure 

1 . Verify that the two rubber blocks, below, are installed on the replacement logic board. 




V '£ ifil 







2. Install new EMI gaskets (076-1057) onto the replacement logic board, where shown 
below. 






Sift fif* "«' "-^w ' 
il te jBi|aftjS J : %■ ^-STj -P 




78 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 



3. Check the two thermal pads on the heatsink, shown below. If damaged, use a black 
stick to remove the material then clean the surface vigorously with an alcohol pad to 
completely remove all of the original thermal material. 




Warning: Whenever the logic board is separated from the heatsink, you must 
remove and install new thermal material to the heatsink at the CPU location. Failure 
to do so can cause the computer to overheat and be damaged. 

4. Use a black stick to remove the original thermal material, shown below, then clean the 
surface vigorously with an alcohol pad to completely remove all of the material. 




Logic Board 



PowerBook G4 (15-inch FW800) Take Apart - 79 



5. Install new thermal pads onto the heatsink where removed, as shown below. 

Center each pad over the location that corresponds to the chip on the logic board and 
press into place, avoiding air pockets. Remove protective backing, if present. 

Note: The two larger pads are interchangeable. 

Important: Avoid unnecessary contact with thermal pads as dirt and body oils 
reduce the pad's conductivity. 




80 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 



6. If the logic board was removed to facilitate another procedure and will be reinstalled, 
remove all thermal material from the CPU chip on the bottom of the logic board with a 
black stick, as shown below. 

Important: Use extreme care not to damage the chip or logic board components. 




7. To replace the logic board, guide the port side into the port openings on the bottom 
case. 

Note: Use care not to catch cables under the board as it is lowered into place. 



Logic Board 



PowerBook G4 (15-inch FW800) Take Apart - 81 



8. Attach the screws in the order shown. 

Note: If a right ambient light sensor will be installed, the upper right screw (10) will be 
installed during that procedure. 




9. Reassemble and test all ports, components and functions of the computer. 

Note: After installing new thermal material, if you must briefly re-separate the logic board 
from the heatsink, it is OK to retain the same, new thermal material, as long as they are 
not handled excessively. 



82 - PowerBook G4 (15-inch FW800) Take Apart 



Logic Board 




Right Blower 



Tools 

This procedure requires the following tools: 

• #1 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

• Logic board 



Right Blower 



PowerBook G4 (15-inch FW800) Take Apart - 83 



Procedure 

1 . Remove the three screws, then lift off the blower. 




2. Install the replacement right blower and reseal tape strip (left blower shown). 




3. Reassemble the computer and test all ports, components and functions. 



84 - PowerBook G4 (15-inch FW800) Take Apart 



Right Blower 




Right USB Board 



Tools 

This procedure requires the following tools: 

• #1 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 

• Optical drive 

• Logic board 



Right USB Board 



PowerBook G4 (15-inch FW800) Take Apart - 85 



Procedure 

1 . Remove the two screws and guide the board out. 




2. Disconnect the flex cable. 




86 - PowerBook G4 (15-inch FW800) Take Apart 



Right USB Board 



3. If the EMI gasket is not installed on the replacement board, transfer the gasket from 
the old board, or install a new gasket, as shown. 




4. Install the replacement right USB board and reassemble the computer. 

5. Test all ports, components and functions of the computer. 



Right USB Board 



PowerBook G4 (15-inch FW800) Take Apart - 87 




Speakers 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• #1 Phillips screwdriver (magnetized) 

• 4 mm socket wrench 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Logic board 

• Left ambient light sensor board, if present 



88 - PowerBook G4 (15-inch FW800) Take Apart 



Speakers 



Procedure 

Note: Lift up any Kapton tape as necessary and reserve for replacement. 

1 . Remove the two screws and remove the small board (if a left ambient light sensor 
board was not removed in the preliminary steps). 




2. Carefully lift wires out of routing channels on the left speaker. 




Speakers 



PowerBook G4 (15-inch FW800) Take Apart - 89 



3. Remove the screw and nut, then carefully lift out the speaker assembly. 

4. Disconnect the speaker cable from the Sound/DC-in board. 




5. Install the replacement speakers, and reassemble the computer. 

Replacement Note: Needlenose pliers may be helpful when reinstalling the nut. 




6. Testing the computer should include using the Sound system-preference pane to test 
the left and right speakers. 



90 - PowerBook G4 (15-inch FW800) Take Apart 



Speakers 




PC Card Cage 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Speakers 



PC Card Cage 



PowerBook G4 (15-inch FW800) Take Apart - 91 



Procedure 

1 . Remove the four screws. 

2. To remove the cage, lift it off of the eject button pin. 

3. Remove the eject button for replacement. 




92 - PowerBook G4 (15-inch FW800) Take Apart 



PC Card Cage 



4. Verify the holes in the Sound/DC-in board, are aligned with the screw bosses under 
them on the bottom case so that the PC card cage screws will install. 

5. Install the replacement PC card cage and eject button. 

Replacement Note: Ensure that the pin on the PC card cage eject button is secured 
by the hole in the cage mechanism. 




6. Lightly install all four screws before tightening (note: longer screws go in the back by 
the flex cable), then tighten in the following order. 




7. Reassemble the computer. 

8. Testing the computer should include inserting a PC card to check that it can be locked 
in and that the eject button works smoothly. 



PC Card Cage 



PowerBook G4 (15-inch FW800) Take Apart - 93 




AirPort Extreme Slot 
& Flex Cable 



Tools 

This procedure requires the following tools: 

• #0 Phillips screwdriver (magnetized) 

• #1 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• AirPort Extreme card 

• PC card cage 

94 - PowerBook G4 (15-inch FW800) Take Apart 



AirPort Extreme Slot & Flex Cable 



Procedure 

1 . Disconnect the AirPort Extreme antenna coupling. Grasp the coupling (not the wires) 
at both ends and pull to separate at the middle. 




2. If replacing the AirPort Extreme flex cable, remove the two screws. 




AirPort Extreme Slot & Flex Cable 



PowerBook G4 (15-inch FW800) Take Apart - 95 



3. Remove four screws and lift out the AirPort Extreme card cage. 





• {'{■■ 

Vic i : \) 







■ t 



4. Notice the routing of the antenna cable jumper and remove. If not replacing, transfer to 
the replacement cage. 




^ 




96 - PowerBook G4 (15-inch FW800) Take Apart 



AirPort Extreme Slot & Flex Cable 



5. Install the replacement AirPort Extreme card cage. 

Replacement Note: Make sure the AirPort Extreme card cage door is closed before 
installing. 

6. Reassemble the computer. 

7. Testing the computer should include inserting an AirPort Extreme card to check that it 
can be fully inserted and the door closed. Use Apple System Profiler to check that the 
AirPort Extreme card is recognized. Test that the AirPort Extreme card is working. 



AirPort Extreme Slot & Flex Cable PowerBook G4 (15-inch FW800) Take Apart - 97 




Display Panel Assembly 



Tools 

This procedure requires the following tools: 

• Torx T8 screwdriver (magnetized) 

• #0 Phillips screwdriver (magnetized) 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Top case 



98 - PowerBook G4 (15-inch FW800) Take Apart 



Display Panel Assembly 



Procedure 

1 . Remove the two screws along the back, closest to the bottom of the computer. 




2. Open the computer display. 

3. Lift the Bluetooth antenna cable out of the channels on the left speaker, then 
disconnect the antenna cable from the Bluetooth board. 

Replacement Note: The Bluetooth antenna cable secures with the modem cable in 
the channels along the left speaker. When re-securing, insert the Bluetooth antenna 
wire into the channel first, then the modem wire. 




Display Panel Assembly 



PowerBook G4 (15-inch FW800) Take Apart - 99 



4. Disconnect the AirPort Extreme antenna coupling. Remove Kapton tape if present, 
then grasp the coupling (not the wires) at both ends and pull to separate at the middle. 

Replacement Note: Use Kapton tape to secure the connector. 




5. Disconnect the inverter cable. 




100 - PowerBook G4 (15-inch FW800) Take Apart 



Display Panel Assembly 



6. On the right side of the computer, disconnect the LVDS cable. 




7. Move the display to a 90-degree angle and remove the four screws. 

Important: Support the display from falling over before removing the last screw. 




^^^HPsnP 


1 10.2 mm s^ 




*5HPv"^f*- 




rO^j - ^ 




mUyUj 


fiS^ ' 


" 


■■ 


1 12.9 mm [ 








*fHTTH 




\ afHHk%^ 




SHj 




s f jfSaEr^ i 












J-Jsri. 




| - Si 


re 



Display Panel Assembly 



PowerBook G4 (15-inch FW800) Take Apart - 101 



8. Lift the display straight up and off of the computer without catching wires. 




9. Install the replacement display panel assembly. 

Replacement Note: Make sure to capture the grounding loop with the back screw. 




102 - PowerBook G4 (15-inch FW800) Take Apart 



Display Panel Assembly 



10. Reassemble and test the computer. 

1 1 . Testing the computer should include the display panel. Use Bluetooth to connect to 
another computer and verify proper AirPort Extreme function. Check the function of 
the RJ-11 modem port. 



Display Panel Assembly PowerBook G4 (15-inch FW800) Take Apart - 103 




Heatsink and Blowers Assembly 



Tools 

This procedure requires the following tools: 

• Torx T8 screwdriver (magnetized) 

• #1 Phillips screwdriver (magnetized) 

• Thermal pad kit (076-1055), if not replacing the heatsink 

• Alcohol pads 

Part Location 




Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• Display panel assembly 

• Logic board 



104 - PowerBook G4 (15-inch FW800) Take Apart 



Heatsink and Blowers Assembly 



Procedure 

Note: The heatsink and blowers are one assembly part. 

1 . Remove the screws and lift out the heatsink and blower assembly. 




Important: Do not attempt to transfer blowers from one heatsink to another. This can 
create acoustic issues. 

2. If the heatsink was removed to facilitate another procedure and will be reinstalled, 
follow the procedures in the Logic Board chapter about replacement of thermal pads. 

3. If installing a replacement heatsink, and the thermal pads are not pre-installed, follow 
the procedures in the Logic Board chapter to install the thermal pads. 

Important: Do not install a heatsink with damaged or missing thermal pads. 



Heatsink and Blowers Assembly 



PowerBook G4 (15-inch FW800) Take Apart - 105 



4. To install the replacement heatsink, install the screws in the order shown. 




A J Tfl ^||H|r4|rj . . r . . r - . • ■ 





5. Reassemble and test all ports, components and functions of the computer. 



106 - PowerBook G4 (15-inch FW800) Take Apart 



Heatsink and Blowers Assembly 




Sound/DC-In Board 



Tools 

This procedure requires the following tools: 

• Torx T8 screwdriver (magnetized) 

• 5 mm socket wrench 

• Black stick (or other nonconductive nylon or plastic flat-blade tool) 

Part Location 




', _jj 



Preliminary Steps 

Before you begin, remove the following: 

• Battery 

• PC card cage 

• Heatsink 

Note: Replacing the RJ-1 1 port and wire requires removing the hard drive. 



Sound/DC-In Board 



PowerBook G4 (15-inch FW800) Take Apart - 107 



Procedure 

1 . Remove the screws. 




2. Disconnect the power and flex cables. 




108 - PowerBook G4 (15-inch FW800) Take Apart 



Sound/DC-ln Board 



3. Guide out the sound/DC-in board. 




Replacement Note: Install the "TO MLB" side of the flex cable to the logic board. 



M 


i | I ■ f ■ P 

j ■ ■ •■ P 4 1 
. . + # P ■ * 

. ■ ■ ■ 4 ri 1 
■ . p 4 + ■ * 

P P I 1 ■ ■ " 


%■■.■ 

4 P 1 

■ \\ 

i 4 
PI" 


v. 

4 P 


l j r - 

■ k I 


■Xv 

:♦:*:■ 

i p i p 
■ % * 


.... 

| 4 P 4 


i t 4 l 

■:■:■;- 

■ ■ ■ ■ 


m* 

* 

r 
I 

1 


- J 

■ \ 

- 


p ■ 

4 P 
■ V 


■■ " P J 

■ ■ 


L . . -. 
■ 41 


*\%m 


-V» p »> 


■V 


p V 


*"<■ P ■ 


,Wh 


tllliLlJ 


/-T^r, 






j%*4*l 


- p p 


» 


i 


^™*^ 


Vp"v 


■IP* 

v.v 

■ PIP 

■ V.'r 

■ PI 




■ 4 1 
fpV- 


| 
i- ■ 

r 


■ « 

r 

■ H 

+ 


i 4 

♦:■: 

4 » 


hi p p 


******* 

4 1 + P 

■V**. 

> h + 

■ VII 

V p * 


4 1 P ■ 

■ p « i 
■.**■-■« 


» ■ 4 
4 h P 

. + ■ 

1 a . 

■ ■ 1 


4 
i 

\ 


v 
■■■ 


■ # 

4 P 


■ 4 I HP 

P 4- 4 * 
.411 


. 4 . r . - -^-^-^ fc . , A , | P 1 




Sound/DC-ln Board 



PowerBook G4 (15-inch FW800) Take Apart - 109 



4. Turn the board over and disconnect the Bluetooth cable. 




5. Remove the RJ-1 1 port, with attached cable, to transfer to the replacement board. 

The RJ-1 1 port slides off the sound/DC-in board but may be very tight. It may be 
helpful to pull on the port, or push it with the flat blade of a black stick, until it begins 
to move, then use a black stick to create leverage behind the port. 




110 - PowerBook G4 (15-inch FW800) Take Apart 



Sound/DC-ln Board 



Replacement Note: If the replacement sound/DC-in board has an RJ-1 1 port 
installed, remove it and install the existing RJ-1 1 port. 

The RJ-1 1 board must go above the standoff. 




6. Important: Connect the Bluetooth connector to the replacement sound/DC-in board. 

7. Install the replacement sound/DC-in board. 

Replacement Note: Verify that the port EMI metal rests above the port plastic. 



ii"- v 




Sound/DC-ln Board 



PowerBook G4 (15-inch FW800) Take Apart - 111 



Replacement Note: Verify that the screw pass-through holes, at the Bluetooth 
connector end of the board, line up with the screw bosses below them so that the PC 
card cage screws can install properly. 




8. Connect the speaker, power, and flex cables. 

9. Reassemble and test the computer. 

10. Testing should include using Bluetooth to connect to another computer. Check the 
function of the modem port, DC-in port and the left USB port. 



112 - PowerBook G4 (15-inch FW800) Take Apart 



Sound/DC-ln Board 




Bottom Case Assembly 



Part Location 



™?™;*ws*mm^^ 





Preliminary Steps 

Before you begin, remove the following: 
Battery 
Optical drive 
Modem 

AirPort Extreme card cage and flex cable 
DC-in board 
Bluetooth board 



Bottom Case Assembly 



PowerBook G4 (15-inch FW800) Take Apart - 113 



Procedure 

1 . Verify that the following items are on the replacement bottom case: 

• EMI shields 

• Display latch assembly 

• Battery latch assembly 

• Sleep LED and wire connector assembly 



t.Vi, ..-...-"-"!■,. -,-n 



bllLLa i iiiiin h L 1lrlll rl 



, ^A 





ii 



"^J:l * 






2. Remove the battery connector and cable from the removed bottom case; transfer to 
the replacement bottom case. 




114 - PowerBook G4 (15-inch FW800) Take Apart 



Bottom Case Assembly 



3. Remove two screws and remove the hard drive holder; transfer to the replacement 
bottom case. 




4. Reassemble and test all ports, components and functions of the computer, including 
battery operation. 



Bottom Case Assembly 



PowerBook G4 (15-inch FW800) Take Apart - 115 



Service Source 




Troubleshooting 



PowerBook G4 (15-inch FW800) 



© 2003 Apple Computer, Inc. All rights reserved. 




General Information 



Wire and Flex Cables 

With the very thin enclosure design and dispersed circuit board, a large number of flex 
cables are used in this computer. In addition, there are a variety of wire cable harnesses 
as well. Many of these cables carry multiple types of signals. 

Here is a list of the cables and the signals that run across them. If you notice a group of 
functions not working, it is likely that the cable is not properly inserted or the connector is 
damaged. 



Cable or Flex Cable Name 


Signal(s) Running Through It 


AirPort Extreme/Bluetooth antenna 

assembly 

(in display housing to diversity board) 


AirPort/Bluetooth radio signals 


AirPort Extreme antenna cable extension 
(to AirPort card cage) 


AirPort radio signal 


AirPort Extreme Flex (to logic board) 


AirPort data / power 


Ambient Light Sensor (Left) cable 


Light data from left side 


Bluetooth cable (to Sound/DC-in board) 


Bluetooth data/power 


Blower, left cable (to logic board) 


Power/control for left blower 


Blower, right cable (to logic board) 


Power/control for right blower 


Hard drive flex (to logic board) 


Hard drive control, data, and power 


Inverter cable (from display panel) 


High voltage for backlight 


Inverter/antenna cable (to logic board and 
wireless modules) 


Display backlight control 
AirPort radio signal 
Bluetooth radio signal 


Keyboard backlight cable (on top case) 


Power to keyboard backlight LEDs 


Keyboard flex (from keyboard) 


Keyboard data and status lines 


LVDS cable (from display housing) 


Video data to display panel 



General Information 



PowerBook G4 (15-inch FW800) Troubleshooting - 1 



Cable or Flex Cable Name 


Signal(s) Running Through It 


Main battery cable 


Connects main battery to logic board 


Modem flex (to logic board) 


Modem control and data 


Optical drive flex (to logic board) 


Optical data, power, and control signals 


PC Card cage flex (to logic board) 


PC card data and power 


Power Button cable 


Power-on signal 


RJ-11 cable (to modem) 


Analog phone signal 


Right USB flex 


Right USB signal and power 


Sleep LED cable (to logic board) 


Power to sleep LED 


Sound/DC-in board flex (to logic board) 


Bluetooth data 
Left USB connector 
Left ambient light sensor 
Digital audio in/out 


Sound/DC-in board cable harness 
(to logic board) 


Power to system and main battery 


Speaker assembly wire harness 


Left speaker 
Right speaker 
Mid range speaker 
Internal microphone 


Trackpad flex 


Trackpad data and power 
Power on button 
Keyboard backlight power 



2 - PowerBook G4 (15-inch FW800) Troubleshooting 



General Information 



Hardware Troubleshooting Tools and Tips 

Apple Hardware Test 2.0.6 (AHT) 

Starting with the PowerBook G4 (17-inch), the Apple Hardware Test software will be 
incorporated into the Software Install and Restore DVD. There is no separate CD for this 
diagnostic. 

Note: Currently, these DVD images are not posted on Service Source online. 

Previously, the C key was held down to boot into the diagnostics. With the combined DVD, 
this action will boot into the software restore section of the disk. In order to access the 
AHT on the DVD follow these steps: 

1 . Insert the DVD named "PowerBook G4 15-inch and 17-inch Software Install and 
Restore" that came with your computer. 

2. Hold down the Option key and restart the computer. 

3. Click Apple Hardware Test volume in the startup manager. 




4. Click the arrow that points to the right. 

5. Follow the on-screen instructions. 

Note: Apple Hardware Test 2.0.1 and later is not backwards compatible with PowerBook 
computers prior to the PowerBook G4 (1Ghz/867Mhz). 

Apple Service Diagnostic (ASD) 

Since the PowerBook G4 (15-inch FW800) is a Mac OS X only system, MacTest Pro 
software does not work on this computer. As a replacement, Apple System Diagnostic will 
be delivered to service providers and can be downloaded from Knowledge Base article 
112125: Service Diagnostics Matrix. 

Important: ASD is not backward compatible with PowerBook computers prior to the 
PowerBook G4 (1GHz/867MHz). 



General Information 



PowerBook G4 (15-inch FW800) Troubleshooting - 3 



APPLE SERVICE DIAGNOSTIC -vl JJ 



f*\f Test Controls \fl elect Tests \/ HWInfo \ 
Error Options; 

# Stop On Error 
O Continue On Error 



Loo pint) Options 
% Loop 



Test Log 



[1 j times 
O l oop tor |i2 1 hours |oc ] minutes 



Current T#»t 

Function 

Ifrmlt: 



Lioop Count: 
Error <cwt : 
Elipied Ti*e: 
Start** 
EnM 



Oa Error 



Stop 

Tor 1 Loop 






Test Log: 



(1 Par lest 



tog | 



Test State: 

Idle 



Start 



Restart 



Shut Down 



Apple Service Diagnostic Main screen 



f*\f Test Controls \f Select Tests \f HWl nfo \ 



P [>4 Memory 

fr Temperature Sensor 

>0Fans 

>0E2C 

>0CHT 

^ rtass Storage-HD 

|> Fireffire 

>07ideo BAM 

> Ethernet Controller 



Select All 



Deselect All 



/T\/7est Controls \/ Select Tests \f HWInfoA 



V rfciwry 

Address as data test 

Patterns test 

0ttarching ones and zeroes test 

Knaizuk Hartmann test 
^0Temperature Sensor 

Temperature Sensor it In Op Range 
^7 Fans 

01s Fan #1 Spinning? 



I 



Select All 



Deselect All 



Apple Service Diagnostic Select test tab 



4 - PowerBook G4 (15-inch FW800) Troubleshooting 



General Information 



/T\/TestCQntrols\/ Select Tests \/ HWInfp\ 



-KA1I L 
Machine Fame: 
Machine ID: 
MLB Serial Hum 
ROM Version: 
ROM Serial Num 
CPU Info: 
Cache Info: 
PMU Version; 

-UM- 
RAM Size: 
RAM Config: 



G I C BOUD 
IfnJsnoBH model 
Power tlac4 ,4 
HH21100KLM24 
$0004 ,42f I 
me G82120J7 
Fob Available 
Hot Available 
85(x55) 



I28ttt 

"UHlfSED - Empty Slot, 
DIMtlO>J1600 - Empty Slot, 
DIMtliyjlSOi - 128 Vb 



Apple Service Diagnostic Hardware info tab 



Test Log 



OGJ 11/02 19:01:05 • TESTIS STARTED - LOOP 10 ♦ 
1 3 : 1 : 05 MLB . KeyLargo . I2C : I2C Register 
19:01:09 CPU: Simple FPU Test 
19:01:13 Storage . Fixed : Device Sel^-Test 

Testing Hard Drive . . . HDD 1 
19:01:14 Storage . Fixed : PIQ Bead Single Block 

Testing Hard Drive . . . HDD 1 
19:01:15 St or age, Fixed : PIO 4 Corner Read Test 

Testing Hard Drive . , . HDD 1 
19:01:19 Storage , Fixed : DMA Read Single Block |; 

Testing Hard Drive . . . HDD 1 
19:01:20 Storage , Fixed : DMA 4 Corner Read Test| 

Testing Hard Drive . . , HDD 1 
19:01:24 FireWire: Register test 
19:01:26 FireWire: Set /clear register test 
19:01:29 Fireffire: PHY register test 
06/11/02 19:01:35 * TESTIIJB PASSED # 



Apple Service Diagnostic Test log tab 

Resetting the Power Manager Unit (PMU) 

The PMU reset button has been removed from the logic board. Use the following key 
combination procedure or the PMU Reset pad (see PMU NMI and PMU Reset pads on 
logic board, below). 

1 . If the computer is on, turn it off. 

2. Reset the power manager by simultaneously pressing and then releasing Shift- 
Control-Option-power button. Do not press the fn (Function) key while using this 
combination of keystrokes. 

3. Wait 5 seconds. 

4. Press the power button to restart the computer. 



General Information 



PowerBook G4 (15-inch FW800) Troubleshooting - 5 



Power-on pads on logic board 

With the top case removed, the power-on button is disconnected. Instead of having to 
reconnect the top case to turn on the system, there are two pads on the logic board when 
shorted together (with a tool like the head of a flat blade screwdriver) is the equivalent to 
pushing the power-on button. 

These pads are located near the edge of the logic board, just above center of the hard 
drive. It is marked POWER BUTTON. The pads are separated with a vertical white line. 




6 - PowerBook G4 (15-inch FW800) Troubleshooting 



General Information 



PMU Reset pads on logic board 

In addition to the power-on button pads on the logic board, there are pads for PMU reset. 
These buttons work when their pads are shorted together (with a tool like the head of a flat 
blade screwdriver). They are marked PMU RESET. The pads are separated with a white 
horizontal line between the pads. 

These pads are located near the edge of the logic board, just above center of the hard 
drive. 




Caps lock LED power check 

There are situations when the system is giving indications that it is shut down (no hard 
drive access, screen is dark, no blower, and so on). However, the logic board may still be 
running. In this case, the logic board is drawing power and generating heat. 

Warning: In this situation, if the computer is put in an enclosed environment like a 
carrying bag, the computer can overheat. 

Check this situation by pressing the caps lock key. If the LED glows, the PMU is running on 
the logic board. After pressing the caps lock key and perhaps other methods of waking it 
up fails, hold the power button down for six seconds to force a shut down of the computer. 
Restart the system to check if it boots up normally. 



General Information 



PowerBook G4 (15-inch FW800) Troubleshooting - 7 



Software Troubleshooting Tips and Tools 

Mac OS X only 

Starting with the PowerBook G4 (17-inch), the system will no longer boot into Mac OS 9. 
Mac OS 9 applications can still be used, but only in the Mac OS X classic mode. 

In locations such as the Startup Disk system preference pane, a Mac OS 9 folder will not 
show up as an option. 

Login window and account 

Mac OS X requires at least one user account to be established. This is the Administrator's 
account. By default, the Accounts system preference pane has the "Log in automatically 
[Admin's name]" check. This automatic login setting allows the system to boot into the 
Finder without having a log-in prompt. 

However, if this box is not checked, you will need a password to get to the Finder. In 
addition, you will need to create a user account after you re-install system software. 

Customer forgot password 

If the customer forgot the password for the computer: 

1 . Insert the Software Install and Restore DVD. 

2. Restart the computer while holding down the C key on the keyboard. 

3. When the installer appears, chose Reset Password from the Installer menu 

4. Follow the on-screen instructions. 

Safe Mode 

The Mac OS X that shipped with the PowerBook G4 (15-inch FW800), has a new startup 
state called Safe Mode. 

Safe Mode is the state Mac OS X is in after a Safe Boot. A Safe Boot is a special way to 
start Mac OS X when troubleshooting. Starting up into Safe Mode does three things to 
simplify the startup and operation of your computer: 

1 . It forces a directory check of the startup (boot) volume. It is identical to using Disk 
Utility's Repair Disk or the fsck -fy terminal command. 

2. It loads only required kernel extensions (some of the items in /System/Library/ 
Extensions). 

3. It runs only Apple-installed startup items (some of the items in /Library/Startup Items 
and /System/Library/Startup items - and different than login items). 

Taken together, these changes can work around issues caused by software or directory 
damage on the startup volume. 

8 - PowerBook G4 (15-inch FW800) Troubleshooting General Information 



To start up into Safe Mode (to Safe Boot), do this: 

1 . Be sure the computer is shut down. 

2. Press the power button. 

3. Immediately after you hear the startup tone, press and hold the Shift key. 

Note: The Shift key should be held as soon as possible after the startup tone but not 
before. 

4. Release the Shift key when you see the screen the gray Apple and progress indicator 
(looks like a spinning gear). 

During the startup, you will see "Safe Boot" on the Mac OS X startup screen (shown 
below). To leave Safe Mode, restart the computer normally, without holding any keys 
during startup. 




Mac OS X 



Starting timed execution services 
SafcBwt 



Knowledge Base Articles 

These troubleshooting articles can be searched from http://www.apple.com/support. 

106692 Mac OS X: Troubleshooting Installation and Software Updates 

1 06693 Mac OS X: Troubleshooting Installation From CD-ROM 



General Information 



PowerBook G4 (15-inch FW800) Troubleshooting - 9 




Hardware Symptom Charts 



How to Use the Symptom Charts 

The Symptom Charts included in this chapter will help you diagnose specific symptoms 
related to the product. 

The steps to solve a symptom are listed sequentially. You might not need to perform every 
step before the symptom is solved. Start with the first step, and then test for the symptom. 
If the symptom persists, replace any modules you removed, go to the next step, and test 
again. Continue down the list until the symptom is solved. 



10 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



Power Adapter Note 

The system was designed to use the Apple 65-Watt Portable Power Adapter that came 
with your computer. The previous 45-Watt Apple power adapter for PowerBooks is plug 
compatible, but it may not provide sufficient power during some activities and power may 
be drawn temporarily from the battery. You can identify the Apple 65W Power Adapter by 
its markings (see photo). 





., 





Under low battery or no battery situations, the 45 watt power adapter may not be able to 
provide enough power to properly support the system. 

Although you may have used the 45 watt adapter with a PowerBook G4 (1Ghz/867Mhz) 
without trouble, the peak power requirements of the PowerBook G4 (15-inch FW800) is 
much higher and will have a higher chance of encountering compatibility issues. 



Hardware Symptom Charts 



PowerBook G4 (15-inch FW800) Troubleshooting - 11 



Startup 

The computer will not power on (no blower movement, hard drive spin up 
and display is not lit) 

1 . Remove any connected peripherals and eject any PC card. 

2. Check that the battery has enough charge to start the computer by pressing the button 
next to the LEDs on the battery. At least one LED must light solid (not flashing). 

3. Connect a known-good Apple 65W Portable Power Adapter (661-3048) and power 
cord or plug to a known-good power outlet; make sure the DC plug is firmly inserted. 
The DC plug should light up, if not, replace Sound/DC-in board. 

Important: The Apple 65W Portable Power Adapter is highly recommended to be 
used with the PowerBook G4 (15-inch FW800) computer. The adapters can be 
identified by 65W in the name and markings, and the metal securing-stud on the plug 
connector. Although previous 45W power adapters (see Knowledge Base article 
88231 PowerBook and iBook: Apple Power Adapter) are plug compatible with the 
PowerBook G4 (15-inch FW800), it may not provide sufficient power during some 
activities and power may be drawn temporarily from the battery. 

4. Try powering up without the battery installed (only works with 65W power adapter). If it 
boots, replace battery connector cable. 

5. Perform the keyboard PMU reset procedure described in the Troubleshooting Aid 
section. 

Warning: Resetting the power manager will permanently remove a RAM disk, if 
present, and all of its contents. You will also need to reset the date and time 
(using the Date &Time system preference pane). 

6. Press Caps Lock key to see if key light comes on. If it does, hold power button down 
for six seconds to shut down the computer and restart. 

7. If it still doesn't start, verify power button cable is connected properly to top case flex 
cable assembly and that the flex cable is connected correctly to the logic board, if 
power button is not functioning correctly or damaged, replace the top case. 

8. Disconnect keyboard completely. Inspect connectors. Restart with keyboard 
disconnected. 

9. Remove any additional RAM. 

10. Remove AirPort Extreme Card. 

1 1 . Verify Sound/DC-in board cable is securely connected. 

12. Try disconnecting the AirPort Extreme flex connector from the logic board and start 
the computer. If it starts, shut it down and check the flex cable connector and the 
connector on the logic board and replace the damaged parts. 



12 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



13. Repeat step 12 with the following flex cables one at a time, reconnecting each before 
proceeding to the next cable: 

• Sound/DC-in flex cable 

• Hard drive flex cable 

• Optical drive flex cable 

• PC card cage flex cable 

• Keyboard flex cable 

• Trackpad flex cable 

• Right USB flex cable 

• Modem flex cable 

If the computer starts up, inspect the flex cable connector and its connector on the 
logic board for damage and replace the damaged parts. 

14. Try known-good Sound/DC-in board. 

15. Replace logic board. 

Memory error message "The built-in memory test has detected an error" 
appears on the screen 

1 . Run Apple Service Diagnostic Test. Note: If the failure is intermittent, run Apple 
Service Diagnostic Test in loop mode (check looping options under Test Controls tab 
and select only the RAM test under the Select Tests tab) for an extended time to test 
the memory. 

2. If the test can't find the memory or finds bad memory, inspect the bad DIMM. Verify 
proper memory is being used. The PowerBook G4 (15-inch FW800) uses PC2700 
(also called DDR333) DDR SDRAM SO-DIMMs with a maximum height of 1.25-inch 
(30 mm). If improper memory is being used replace it. Otherwise, try reseating the 
DIMM and retest. If still reported as bad, replace it. 

3. Check the memory connector for damage (retention arms broken, connectors bent or 
missing, connector lifted from logic board). If damage is detected replace the logic 
board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 13 



Blue screen appears (a spinning disc cursor may also be visible), 
Prohibitory Sign appears, 

Restart dialog box appears (Mac OS X 10.2 kernel panic window), or 
Gray screen during startup 




w 



Prohibitory Sign 



Vou need to restart your computer Hold down the Power button 
for several seconds or press the Restart button, 

Veuillez redemarrer votre ordinateur Maintenez la touche de 
demarrage enfoncee pendant plusieurs secondes ou bien appuyez 
sur le bouton de reinitialisation. 

Sie mtissen Ihren Computer neu starten. Halten Sie dazu die 
Einschalttaste einige Sekunden gedruckt oder drucken Sie die 
Neustan-Taste. 



Kernel Panic dialog box 

1 . Make sure all external devices are disconnected and any PC card ejected. If kernel 
panic goes away, troubleshoot the external device by reconnecting each device until 
the panic occurs. 

2. If there are two RAM cards installed in the expansion slots, remove the top card and 
restart. 

• If symptom repeats, replace bottom card with known-good RAM card. 

• If symptom does not repeat, replace top RAM card with known-good RAM card and 
restart. 

For assistance in software troubleshooting, go to Knowledge Base article 106464: Mac 
OS X: Troubleshooting a Startup Issue. 

14 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



Flashing question mark appears on the screen 

Note: This system will only boot the Mac OS X system that shipped with this computer or 
later. It does not support booting into Mac OS 9. 

1 . Start up from the software install and restore DVD that came with the computer (hold 
down the "C" key during restart). 

2. When the Installer opens, from the Installer menu, select Open Disk Utility. 

3. When the Disk Utility opens, on the left hand side, all disk and volumes are listed. If 
you don't see the internal hard drive, the system is not recognizing it. Skip to step 4. 
Otherwise, select the First Aid tab and follow the instructions to verify the hard disk, 
and repair if needed. Restart the computer. 

4. If the hard drive is not recognized, check the hard drive flex cable for damaged 
connectors (connector peeled off the flex cable, for example), and if bad replace the 
hard drive flex cable. 

5. Reseat the hard drive flex cable. If still not recognized, replace the hard drive. 

Important: If the computer is under warranty and data recovery is required, refer to 
Knowledge Base article 31077: DriveSavers: Hard Drive Data Recovery & Warranty 
Implications, for important information. 

6. Reinstall system software using the software install and restore disc. 

Note: Don't forget to install both the Mac OS X and Applications and Classic 
software. This operation is completed with two separate installs. Restore disc images 
are available at http://service.info.apple.com. Select "Disc Images." 

Computer begins to power up, the blowers and hard drive are spinning, 
pressing caps lock key and LED turns on, but there is no startup chime or 
video 

1 . Reset the power manager by using the keyboard sequence. Wait five seconds before 
continuing. Press the power button to start the computer. 

Warning: Resetting the power manager will permanently remove a RAM disk, if 
present, and all of its contents. You will also need to reset the date and time 
(using the Date &Time system preferences pane). 

2. Replace the logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 15 



System shuts down intermittently 

Important: This issue can be a result of not using the 65W power adapter with the 
PowerBook G4 (15-inch FW800) computers. Confirm with the customer which adapter 
they were using when having this problem. The adapter can be identified by 65W in the 
name and markings, and the metal securing-stud on the plug connector. 

1 . Disconnect all external peripherals and eject any PC card. 

2. Make sure a known good fully charged battery is fully inserted. Check both battery 
latches are fully engaged and are not broken or getting caught before fully catching. 
Check battery connection to logic board. 

3. Make a visual inspection of the battery connector in the battery bay. Make sure all 
blades are visible and not bend. If damaged replace the battery connector. 

4. Make sure system is not over heating, the air vents are clear and unit was not used on 
a soft surface. 

5. Check that the blower cables are connected and the blowers are operational. 

6. Make sure all feet are still on the system bottom. If not, order foot replacement kit. 

7. Check that the thermal material between the heat exchanger and logic board is in 
contact with both by unscrewing the logic board screws and gently pulling up on the 
left side of the board to verify resistance caused by adhesion from the thermal 
material. If not, new thermal materials for the processor, control ASIC, and video chip 
must be reinstalled (see Logic Board Take Apart chapter). 

8. Remove the battery and connect known-good 65W power adapter (661-3048) and 
power cord or plug to a known-good power outlet; make sure the DC plug is firmly 
inserted. The DC plug should light up, if not, replace Sound/DC-in board. 

9. Verify Sound/DC-in board cable is securely connected and cable shows no signs of 
wear. 

10. Try known-good Sound/DC-in board. 

1 1 . Replace the logic board. 

System shuts down almost immediately after startup 

1 . Disconnect all external peripherals and eject any PC card. 

2. Make sure a known good battery is fully inserted. Check battery charge and make 
sure that at least two LED charge indicators light, otherwise connect the adapter. The 
adapter should light amber when plugged in. If not, replace the adapter. 

3. After charging for a while, if battery does not seem to charge, or if charged up but 
quickly discharges, replace the battery. Verify known good battery. 

4. Check battery connection to logic board, and check wire attachment to connectors. 

5. If known good battery does not charge, replace Sound/DC-in board. 

6. Replace the logic board. 

16 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



Application Quits, Kernel panic or other booting problems 

1 . If a specific application quits, replace the application. Verify the application is 
compatible with OS X. 

2. Clear parameter RAM. Hold down Command-Option-P-R during startup until you hear 
a second startup chime. 

3. Run Disk Utility from the Software Install and Restore DVD. 

4. Perform a clean install of system software with the software install and restore disc 
that came with the computer. 

Note: Restore disc images are available at http://service.info.apple.com. Select "Disc 
Images." 

5. Reboot system. 

6. Run Apple Service Diagnostic in loop mode (Control-L) for an extended time to test 
the memory. If the test finds bad memory, replace the DIMMs one at a time and test 
until all bad DIMMs are replaced with known-good modules. 

7. Replace the logic board. 

Error Beeps 

The computer automatically performs a power-on self test when it is turned on after being 
fully shut down (not a restart). This section describes what to do if beeps are heard during 
the startup. 

Note: The PowerBook G4 (15-inch FW800) uses PC2700 (also called DDR333) DDR 
SDRAM SO-DIMMs with a maximum height of 1 .25-inch (30 mm). Refer to Memory Card 
Take Apart chapter for removal and installation. 

Computer beeps once at startup 

1 . One beep means that no RAM is detected. 

Note: There is no RAM on the logic board itself, so the computer will beep if no 
memory is installed in at least one of the RAM slots. 

2. Put the original RAM that came with the computer back in, or put in known-good and 
compatible RAM and restart. 

• If symptom does not repeat, replace RAM card(s). 

• If symptom repeats, replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 17 



Computer beeps twice at startup 

1 . Two beeps means that EDO memory is installed in the RAM expansion slot. The 
PowerBook does not accept EDO memory. 

2. Replace RAM card(s) with known-good and compatible RAM and restart. 

• If symptom repeats, replace logic board. 

Computer beeps three times at startup 

1 . Three beeps means that no RAM banks passed memory testing. 

2. If a RAM card is installed in the upper expansion slot (if not, skip to next step), remove 
it and restart. 

• If symptom does not repeat, replace RAM card. 

• If symptom repeats, replace RAM in lower RAM slot with known-good and 
compatible RAM card and restart. If symptom repeats, replace logic board. 

3. If a RAM card is not installed in the upper expansion slot, replace RAM in lower RAM 
slot with known-good and compatible RAM card and restart. 

• If symptom repeats, replace logic board. 

Computer beeps four times at startup 

1 . Four beeps indicates a bad checksum for the remainder of the boot ROM. The ROM 
(which is located on the logic board) is bad. 

2. Replace RAM card(s) with known-good and compatible RAM and restart. 

• If symptom repeats, replace logic board. 

Related Knowledge Base articles: 

58442: Power On Self-Test Beep Definition - Part 2 

95132: PowerBook G4: Installing or Replacing Memory 



18 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



AirPort Extreme Card 

AirPort Extreme Card not recognized 

1 . In Mac OS X, use Software Update in system preferences or see the Apple Software 
Updates web page to make sure the latest version of AirPort Extreme software is 
installed. 

2. Restart the computer. 

3. Open AirPort in system preferences and make sure AirPort is on and Base Station is 
selected. 

4. Check the AirPort Extreme Card flex cable connection to the logic board. 

5. Remove and reinstall the AirPort Extreme software. 

6. Replace with known-good AirPort Extreme Card. 

7. Replace logic board. 

AirPort connection is slow 

1 . Move computer closer to AirPort Base Station or other AirPort device. 

2. Too many users are accessing network at the same time causing heavy network 
traffic. To improve network connection speed, add additional AirPort Base Stations. 

3. Check for other changes in the environment that may cause interference with the 
AirPort signal. 

4. Use Software Update in system preferences or see the Apple Software Updates web 
page to make sure the latest version of AirPort Extreme software is installed. 

5. Restart the computer. 

6. Check the AirPort Extreme Card flex cable connection to the logic board. 

7. Check the connection on both ends of the AirPort Extreme Card antenna jumper 
cable, if loose, reconnect and test again. 

8. Check the AirPort Extreme Card antenna jumper cable for damaged insulation or a 
crimped cable. If bad, replace antenna jumper cable. 

9. Replace with known-good AirPort Extreme Card. 

10. Check AirPort Extreme antenna wire coming from display panel for nicked insulator or 
crimped wire. If bad, replace display panel assembly. 

11. Replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 19 



Battery 

Battery will not eject 

1 . Flip over the unit and turn the battery latch clockwise. 

2. If the battery does not pop up, use a small plastic flat-blade tool to pry up the battery 
around the battery latch. 

3. Verify proper latch operation, by exercising the latch. If it does not move smoothly or 
evenly, replace the bottom case. 

4. If the latch does exercise correctly, verify that the customer is not installing the battery 
with excessive force or the body of the battery has not been deformed around its 
perimeter. 

Warning: If the battery plastic housing has been damaged, or the two halves of the 
plastic housing have separated, the battery is unsafe for use. 

5. Try a new battery. 

6. Replace bottom case. 

The battery won't charge 

1 . Remove any externally connected peripherals. 

2. Try known-good power outlet. 

3. Connect known-good 65W power adapter (661-3048) and power cord or plug; make 
sure the DC plug is firmly inserted. The DC plug should light up, if not, replace Sound/ 
DC-in board. 

If the power adapter light is green, turn over the computer and press the battery 
button. The battery lights should glow green and stay on if the power adapter is 
operating correctly. 

Important: The Apple 65W Power Adapter is highly recommended be used with the 
PowerBook G4 (15-inch FW800) computer. The adapters can be identified by 65W in 
the name and markings, and the metal securing-stud on the plug connector. Although 
previous 45W power adapters (see Knowledge Base article 88231 PowerBook and 
iBook: Apple Power Adapter) are plug compatible with the PowerBook G4 (15-inch 
FW800), it may not provide sufficient power to operate the system during some 
activities and may draw power from the battery. 

4. Try known-good battery. If it charges, replace the battery. If doesn't charge, check the 
battery connector and its connection to the logic board. 

5. Replace the battery connector assembly (requires removing the logic board). 



20 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



6. Turn off the computer. Perform the keyboard PMU reset procedure described in the 
Hardware Troubleshooting Tools and Tips section. Wait five seconds before 
continuing. Press the power button to start the computer. 

Warning: Resetting the power manager will permanently remove a RAM disk, if 
present, and all of its contents. You will also need to reset the date and time 
(using the Date &Time system preference pane). 

7. Make sure the Sound/DC-in cable is firmly connected. Look for damaged insulation or 
wires. 

8. Replace Sound/DC-in power cable. 

9. Replace Sound/DC-in board. 

10. Replace logic board. 

Bluetooth 

Bluetooth system preferences does not show up under Hardware system 
preferences 

1 . Check the wire connectors to Sound/DC-in board and the Bluetooth card. Make sure 
the cable is not damaged and fully inserted. 

2. Replace Bluetooth card. 

3. Replace the logic board. 

Bluetooth Card not recognized by other devices 

1 . Open Bluetooth in system preferences and make sure under the Settings tab that 
Discoverable is checked. 

2. Check the Bluetooth antenna is connected to Bluetooth card. 

3. Replace with known-good Bluetooth card. 

4. Replace display panel assembly. 

5. Replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 21 



Display 

Display latch not working 

Note: When the display is being closed, hooks in the top of the display housing should be 
magnetically pulled down to the latch. When the latch button is pushed, the hook should 
release and retract into the display housing. 

1 . Verify hook operation by using a small low-power magnet to exercise the latch 
mechanism. Make sure hooks are not bent. 

2. If the hook does not operate properly, replace the display panel assembly. 

3. If the latch or latch button does not operate properly, replace the top case assembly. 

When displaying a single color over the screen area, the LCD panel shows one 
or more pixels that are not properly lit 

To determine whether or not the display has an acceptable number of pixel anomalies, 
follow the steps below: 

1 . Set the display image to one of the following colors: all-white display, all-red display, 
all-green display, or all-blue display. Knowledge Base article 1 12125: Service 
Diagnostics Matrix, has the LCD Tester Diagnostic Utility that will generate these 
patterns on the screen. 

2. Using a jeweler's loupe, pocket microscope, or other magnifying device, identify and 
count each pixel anomaly: 

• Bright subpixel anomaly = subpixel that is always on 

• Dark subpixel anomaly = subpixel that is always off 

3. The number of acceptable pixel anomalies for this system is: 
Acceptable Number of Subpixel Anomalies 



Bright 


Up to 3 


Dark 


Up to 5 


Combination 


Up to 7 



4. If the number of subpixel anomalies exceeds the acceptable number listed in the 
above chart, replace the display panel assembly. 

Replace 



Bright 


4 or more 


Dark 


6 or more 


Combination 


8 or more 



22 - PowerBook G4 (15-inch FW800) Troubleshooting 



Hardware Symptom Charts 



5. If the number of subpixel anomalies is acceptable, explain to the customer that the 
pixel anomalies are within specifications, and no repair is necessary. 

Important: Do not release the specifications to customers. Instead, inform them that a 
certain number of subpixel anomalies are considered acceptable, and these factors apply 
to all manufacturers using LCD technology — not just Apple products. 

When speaking with customers, please use the following explanation: 

Active-matrix LCD technology uses rows and columns of addressable locations (pixels) 
that render text and images on screen. Each pixel location has three separate subpixels 
(red, green, and blue) that allow the image to be rendered in full color. Each subpixel has a 
corresponding transistor responsible for turning the subpixel on or off. 

There are typically millions of these subpixels on an LCD display. For example, the LCD 
panel used in the Apple Cinema HD display is made up of 2.3 million pixels and 6.9 million 
red, green, and blue subpixels. Occasionally, a transistor does not work perfectly, which 
may result in the affected subpixel being turned on (bright) or turned off (dark). With the 
millions of subpixels on a display, it is quite possible to have a low number of faulty 
transistors on an LCD. Therefore, a certain number of subpixel anomalies are considered 
acceptable. Rejecting all but perfect LCD panels would significantly increase the retail 
price for products using LCD displays. These factors apply to all manufacturers using LCD 
technology— not just Apple products. 

Hard Drive 

Internal hard drive will not initialize: 

1 . Start up from the software install and restore disc that came with the computer (hold 
down the "C" key during restart). 

2. When the Installer opens, from the Installer menu, select Open Disk Utility. 

3. If the hard drive is recognized, format it under the Erase tab. 

4. If the hard drive is not recognized, reseat the hard drive flex cable, or replace if 
needed. 

5. If still not recognized, replace the hard drive. 

6. Reinstall system software using the software install and restore disc. 

Important: If the computer is under warranty and data recovery is required, refer to 
Knowledge Base article 31077: DriveSavers: Hard Drive Data Recovery & Warranty 
Implications, for important information. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 23 



Keyboard 

No response from any key on keyboard 

1 . Remove any connected peripherals and eject any PC card. 

2. Attach an external USB keyboard, if it doesn't work, go to step 7. 

3. Turn off the computer. Check the keyboard flex cable connection to the logic board 
(especially check the connector on the logic board for damage). 

4. Start up from the software install and restore disc that came with the computer (hold 
down the "C" key during restart, if possible) to verify that it is not a software problem. 

5. Replace keyboard. 

6. Replace logic board. 

No keyboard illumination 

1 . Go to Keyboard system preference pane and make sure the "Illuminate keyboard in 
low light conditions" check box is checked. Try using system in a dimly lit environment. 

Note: The keyboard illumination is not bright enough to be seen in most well lit spaces. In 
order to view the key being illuminated, the ambient light needs to be dim. 



•o- 



' a ft « 






I I > V 



t^iNitiDlfitirtt* 
. . -_■■__ 



NhHiminjIjinn 

Iidn ei[ Mtun ktvteud ri ran uud tor 



<9 



2. Check the keyboard backlight cable connection to the trackpad flex cable, if bad, 
replace the top case. 



3. Replace logic board. 
24 - PowerBook G4 (15-inch FW800) Troubleshooting 



Hardware Symptom Charts 



Half keyboard is illuminated. 

1 . Check the keyboard backlight cable connection to the trackpad flex cable and the 
trackpad flex cable connection to the logic board. If the connections look good, change 
the top case. 

Microphone 

The microphone is not working 

1 . Check the Sound system preference pane and verify the selection under the Input tab 
is for the built-in microphone. 

2. Check the signal level and level meter and adjust the gain. 

3. Reset PRAM (Press the power button, then hold down the Option-Command-P-R 
keys until you hear the startup chime at least one additional time after the initial 
startup chime). 

Warning: Resetting the PRAM will permanently remove a RAM disk, if present 
and all of its contents. You will also need to reset the date and time (using the 
Date &Time system preference pane). 

4. If there is no sound output from the internal speaker as well as the microphone not 
working, verify cable connections. 

5. Replace the speaker assembly. 

6. Replace sound/DC-in board flex cable. 

7. Replace the sound/DC-in board. 

8. Replace the logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 25 



Modem 

No modem dial tone 

1 . Check that the correct modem is selected in the Network Port Configuration section of 
the Network system preferences. 

2. Verify known-good analog (not digital) telephone line. 

3. Verify known-good RJ-1 1 telephone cable. 

4. Verify RJ-1 1 cable is not plugged into Ethernet port. 

5. Inspect RJ-1 1 connector and modem port for pin damage. 

6. Verify RJ-1 1 telephone cable is firmly installed in the modem port. 

7. If using Apple Remote Access, select Ignore Dial Tone in the Modem control panel. If 
the modem connects with this settings selected, try another phone line. If using a 
terminal or communications program, enter atxl to disable tone detection. To reset the 
modem back to the factory settings, enter atz. 

8. Check RJ-1 1 wires to Sound/DC-in board. Replace if bad. 

9. Verify RJ-1 1 wire's 2-pin connectors are plugged into correctly. 

10. Check modem flex cable is properly installed. Replace cable if needed. 

11. Replace modem. 

12. Replace logic board. 

Modem does not respond (can hear dial tone) 

1 . Check that the correct modem is selected in the Network Port Configuration section of 
the Network system preferences. 

2. Check modem application is properly configured. 

3. Check modem flex cable is properly installed. Replace cable if needed. 

4. Replace modem. 

5. Replace logic board. 



26 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



Optical Drive 

The optical drive does not accept CD or DVD disc (mechanical failure) 

1 . Verify disc is not warped and is a 1 2 cm circular disc. 

2. Check that a small disc is not stuck inside, or other foreign objects. Remove drive from 
system to extract disc. 

3. Verify disc is pushed almost all the way into the slot. 

4. Check the optical drive flex cable. 

5. Replace optical drive. 

The disc icon does not show up on desktop, or a dialog box appears to 
initialize disc, when inserting a read-only disc 

1 . Verify the correct type of disc is being used. 

2. Use Software Update system preference pane to check if there is updated firmware. 

3. Try cleaning the disc. If it is dirty or scratched, it may not mount. 

4. Try a different disc. 

5. Replace optical drive cable. 

6. Replace optical drive. 

Difficulty writing to optical media 

1 . Verify the correct type of disc is being used. 

2. Try a different brand or speed of CD-R disc. 

Note: Some brands of 24x or 32x CD-R media may not work with the SuperDrive. 

Note: There are two factors in the ability for the optical drive to write to media. First, there 
are varying qualities of blank optical media. Some media are made to such low 
specifications that the ability for the drive to write to it is marginal. 

There are variations in optical media even under the same brand. Some brands source 
their optical media from a variety of manufacturers, so there may be variations in the 
quality. 

Second, an optical drive that supports writing to a CD-R/RW or DVD-R/RW disc requires a 
special writing algorithm for discs from different disc manufacturers. There are hundreds of 
disc manufacturers, it is impossible to implement writing algorithms for each disc 
manufacturer. Usually, drive manufacturers implement special writing algorithms for discs 
from major disc manufacturers. For discs that are not supported by the drive with special 
writing algorithms, the drive will use a generic writing algorithm to write the disc. In this 
case, the writability and readability may not be optimal. 

3. Replace optical drive flex cable. 

4. Replace optical drive. 

Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 27 



PC Card 

PC Card will not insert into the PC Card slot 

1 . Make sure the PC Card eject button is in, before attempting to insert a PC Card. 

2. Make sure the PC Card is right side up (cards are keyed and cannot be inserted 
upside down). 

3. Verify the PC Card is not warped or damaged in any way; if so replace the card. 

4. Try a different PC Card. 

5. Carefully raise the PC Card slot cover and check for a foreign object inside the slot. 

6. If the slot cover is preventing the card from being inserted, replace the top case. 

7. Replace PC Card Cage. 

PC Card does not mount to the desktop 

1 . Make sure the PC Card has its drivers installed. 

2. Check if a known good PC card works in this slot. The PC card may be bad. 

3. Check the PC card cage flex cable connection to the logic board. 

4. Replace the PC card cage. 

5. Replace the logic board. 

Ports 

A USB port is not recognizing devices 

1 . Completely shut down, then press the power button to start the computer. 

2. Use Software Update system preferences to verify that the latest software is installed. 

3. For USB, test ports with an Apple keyboard or mouse. If the left port is not recognized 
check the Sound/DC-in flex cable's condition and connection. If the right port is not 
recognized check the backup battery flex cable's condition and connection. 

4. If the USB flex cables are fine, replace the Sound/DC-in board for the left USB port or 
the backup battery board for the right port. 

5. Use Apple System Profiler to verify that the computer is recognizing the bus. If not 
replace the logic board. 



28 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



A USB device not recognized by computer 

Note: If you are trying to use a serial device with a USB/Serial adapter, check with the 
manufacturer of the adapter for compatibility. 

1 . Completely shut down, then press the power button to start the computer. 

2. Verify current driver for the device is installed. 

3. If a camera, turn on camera after initiating download with camera application. 

4. Try the other USB port. 

5. Try different USB device on same port. 

6. Eliminate chain by plugging in only one peripheral. 

7. Try known-good Apple USB keyboard or mouse to verify the port is working properly. If 
the left port is bad, check the Sound/DC-in board flex cable and connections. If the 
right port is bad, check the backup battery flex cable and connections. 

8. If the USB flex cables are fine, replace the Sound/DC-in board for the left USB port or 
the backup battery board for the right port. 

9. Replace logic board. 

A Fire Wire port is not recognizing devices 

1 . Test the FireWire 400 and FireWire 800 ports by connecting to another computer 
using FireWire Target Disk Mode. 

Refer to Knowledge Base article 58583: How to Use FireWire Target Disk Mode. 

Important: When in FireWire Target Disk Mode, use only one FireWire port at a time. 
Otherwise you risk corrupting the internal hard drive volume. 

2. Verify that drivers are installed properly for third party, if needed. 

3. Make sure the cables are firmly attached. 

4. Try a different cable. 

5. If self powered make sure that the power supply is connected and device's LED 
indicates that it is getting power. 

6. Replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 29 



Sound 

No sound heard and the Speakers section of the Sound system preference 
pane indicates that an external device is plugged in (to the headphone jack or 
USB ports) 

1 . If there is nothing plugged into the headphone jack or USB ports, under the Output tab 
of the Sound system preference pane should be set to the internal speakers. 

2. If not, and if nothing is plugged in, try plugging in headphones or external speakers. 
Restart the computer. Remove the device. 

3. Reset PRAM (Press the power button, then hold down the Option-Command-P-R 
keys until you hear the startup chime at least one additional time after the initial 
startup chime). 

Warning: Resetting the PRAM will permanently remove a RAM disk, if present, 
and all of its contents. You will also need to reset the date and time (using the 
Date &Time system preferences pane). 

4. Check the sound board flex cable to see if the cable is properly seated, the connection 
is good, and there is no cable damage. 

5. Replace sound board. 

6. Replace logic board. 

No sound from speaker(s) 

1 . Use the Software Update system preference pane to verify that the latest audio 
update has been installed. 

2. Press the F3 key (with the fn key pressed and not pressed) to verify that mute mode is 
not enabled. 

3. Press the F4 or F5 key (with the fn key pressed and not pressed) to check the volume 
setting. 

4. Verify no external speakers or headphones are plugged in. 

5. Check the speakers tab on the Sound control panel to confirm that the software is 
correctly seeing that there are no external speakers or headphones connected. 

6. Shutdown computer and restart. 

7. Reset PRAM (Press the power button, then hold down the Option-Command-P-R 
keys until you hear the startup chime at least one additional time after the initial 
startup chime). 

Warning: Resetting the PRAM will permanently remove a RAM disk, if present, 
and all of its contents. You will also need to reset the date and time (using the 
Date &Time system preference pane). 

8. Verify that the speaker cable is connected properly to sound board. 

30 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



9. Check speaker cable. Verify left and right cable connections. 

10. Check with headphones or external speaker, if audio is heard, replace speaker 
assembly. 

1 1 . Replace sound board flex cable. 

12. Replace sound board. 

13. Replace the logic board. 

Distorted sound from speakers 

1 . Verify sound is correct with external speakers/headphones. If sound is correct, check 
speaker wire and connections. 

2. In Sound system preference pane, check balance. 

3. Compare same sound with two different units to make sure that sound is actually 
distorted. 

4. Check speaker wire. If damaged, replace speaker assembly. 

5. Replace sound board. 

6. Replace sound board flex cable. 

7. Replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 31 



Trackpad 

The cursor does not move when you are using trackpad 

1 . Verify that no USB device is connected. 

2. Boot from the Software Install and Restore DVD to verify that it is not a software 
problem. 

3. Reset the power manager by pressing the key combination Control-Option-Shift 
Power. 

Note: Make sure you do not hold down the "fn" key when resetting the power 
manager. 

4. Check trackpad flex cable connection to the logic board. 

5. Replace top case. 

6. Replace logic board. 

The cursor intermittently does not move or moves erratically 

Note: User must touch with the surface of only one finger at a time and point directly down 
on the trackpad surface. 

1 . Clean trackpad surface (with computer off, using a non-static-inducing material). 

2. Completely shut down, then press the power button to start the computer. 

3. Reset the power manager by pressing the key combination Control-Option-Shift- 
power. 

Note: Make sure you do not hold down the "fn" key when resetting the power 
manager. 

4. Try unit on battery power. If problem goes away, replace power adapter. 

5. Place the Software Install and Restore DVD in the optical disc drive, press the start 
button and hold down the "C" key. Check the cursor movement, to see if the problem is 
software. 

6. Check trackpad flex cable connection to the logic board. 

7. Replace top case. 

8. Replace logic board. 



32 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts 



Video 

No display, or dim display, but computer appears to operate correctly 

1 . Remove any connected peripherals. 

2. Make sure F1 key is not stuck down. 

3. Press the F2 key (with the fn key pressed and not pressed) to increase the screen 
brightness settings. 

4. Reboot the computer — hold down the Control and Command keys and press the 
Power button to restart the computer. Or, press and hold the Power button for 5 to 10 
seconds to shut down the computer, then press the Power button to restart. 

5. Important: The Apple 65W Power Adapter is highly recommended be used with the 
PowerBook G4 (15-inch FW800) computer. The adapters can be identified by 65W in 
the name and markings, and the metal securing-stud on the plug connector. Although 
previous 45W power adapters (see Knowledge Base article 88231 PowerBook and 
iBook: Apple Power Adapter) are plug compatible with the PowerBook G4 (15-inch 
FW800), it may not have sufficient power to operate the system during some activities 
and may draw power from the battery. 

6. Verify inverter cable and LVDS cable connections are seated properly and that the 
cables are not damaged. 

7. Replace display panel assembly. 

8. Replace logic board. 

Computer appears to work, but no video on external device connected to the 
TV out port (S-video out port) 

1 . The device must be connected to the S-video port while the PowerBook is sleeping or 
off for the device to be recognized. 

2. Verify monitor that is used in testing is known-good and is supported by this computer. 

3. Try different cable(s). 

4. Replace logic board. 

No video on an external VGA device connected to the external monitor (DVI) 
port 

1 . Verify monitor that is used in testing is known-good and is supported by this computer. 

2. Try another DVI-to-VGA adapter cable. 

3. Restart the computer and test again. 

4. Replace logic board. 



Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 33 



Misc. Symptoms 

The Date and Time settings reset all the time 

Note: Resetting the power manager or PRAM resets the date and time. 

1 . Do a backup battery test: 

• Set the date and time. 

• Perform a Shut Down from the Apple menu. 

• Remove the main battery and disconnect the power adapter for 10 minutes. 

• Connect the power adapter, insert the battery, and power on the computer. 

• If the date and time were lost the backup battery may be dead or discharged. 

• Remove the main battery from the unit and leave the PowerBook plugged in for at 
least 5 hours. 

Note: If a discharged main battery is installed in the computer, recharging the backup 
battery may take up to 48 hours to completely charge. It is okay to use it while it is 
charging. 

• If the date and time still reset, replace the backup battery cable. 

2. Replace backup battery board. 

3. Replace the logic board. 

Note: For main and backup battery part numbers, refer to Knowledge Base article 1 1751 : 
Macintosh Family: Batteries and Part Numbers. 

Feet came off the bottom case 

1 . Replace the missing foot. 

Sleep LED does not come on when lid is closed 

1 . Put the computer to sleep using the menu option. If the sleep LED goes on, there is a 
problem with lid sensing. If not skip to step 3. 

2. Put a small low-power magnet over the trackpad and move it around. If the unit sleeps, 
replace the top case. If not replace the display panel assembly. 

3. Check that the sleep LED is plugged into the logic board. 

4. Connect a USB mouse. Short the power on pads on the logic board to boot the 
system and use the mouse to sleep from the menu. Measure the voltage at the LED 
connector. If power is present, replace bottom case. 

5. Replace logic board. 



34 - PowerBook G4 (15-inch FW800) Troubleshooting Hardware Symptom Charts